Is annotation possible?

[Brechard]

Hi!

I have made a search engine for my django backend using plain django filtering but I would like to boost it using ElasticSearch and here I found myself. I actually have several questions since it is the first time I do something similar.

For now I have implemented the search with fuzziness and it is working great but I would like to annotate the results with the reviews that the items have received, how can I do that? I already have the annotation working with the django filter functions, I just want to now use it with elasticsearch.

The review model is fairly simple:

class ItemReview(models.Model):
    book = models.ForeignKey('books.book', on_delete=models.CASCADE, related_name='item_review')
    from_user = models.ForeignKey(UserProfile, on_delete=models.SET_NULL, null=True, related_name='item_from_user_review')
    rating = models.DecimalField(decimal_places=2, max_digits=3)
    review = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True, editable=False)

also my book object has some fields that are not used for the search but are needed later on front-end, should I still put them on the Document file? Since if I do not, then I get a serializer error.

Got AttributeError when attempting to get a value for field `status` on serializer `BookAllBasicsSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `Hit` instance.
Original exception text was: 'Hit' object has no attribute 'status'.

Thanks in advance!